Improvement in piston-packing



| 1 WJ f l M L i j f .5L y 0 r|l .llllllllllllllL rl rrFerEns. FHoro-IJIHOGMPHEH. WASNIMHON D C @met @imita JOHN CLARK, OF HARRISBURG, PENNSYLVANIA.

Letters Patent No. 99,846, dated February 15, 1870.

IMPROVEMENT IN PISTON-PACKING.

The Schedule referred to in these Letters Patent and making part of the same.

I, JOHN CLARK, of Harrisburg, Dauphin county, Pennsylvania, have invented certain Improvements in Packing the Plnngers of Steam-Pumping Engines, oi' which the following is a specification.

The invention is intended to be an improvement upon ,the well-known Worthington and Baker steam-pumping engine, and consists in the application of an adjust able packing, constructed so as to compensate for wear to the central transverse partition of the barrel of such an engine, through which the plunger' plays.

The ligure is a sectional plan.

A is the pump barrel, rectan ular in cross section.

Bis a transverse partition p aced centrally of the barrel.

C is a cylindrical bushing, fastened by means of its flange, in any suitable manner, to one side of the partition.

Within the bushing C is placed the split packing ring D, having the usual diagonal lines of section a b separated by the oset c, and the break joint 7i inter` posed between thelines of section to prevent the transmission ofsteam fromone to the other.

' The interior of the cylindrical bushing has a regular taper from one end to the other, and the exterior of the packing ring has a corresponding taper, while the interior or bo're of such ringis cylindrical, and closely Iitted by the plunger E.

From the larger end of the packingring project two ears d d from opposite sides, which ears are connected by means of threaded bolts e e with the flange, of the bushing C.

By turning up `the nuts ou the threaded rods, the packing may be forced into the bushing with any degree of tightness required, andas ot'teu as the wear of the plunger may make it expedient.

F is the cylinder in which plays the piston head of the plunger. l This double-acting pump operates by thealternate rushing of water into the compartments of the barrel A from one side, through puppet valves, as the plunger is-witl-ldrawn, and its alternate expulsion at the other end as the plunger returns.

No pump barrel of this description has, sofar as I am aware, ever been provided with an adjustable packing for the plunger.

Having thus described my invention, r

Vhat I claim as new, and desire to secure by Let# Aters Patent, is-

The combination of the adjustable packing D provided with the ears d, with the bushing G, rods e, and partition B, in the manner and for the purpose described.

` JOHN ULARK.

Witnesses:

WM. MITCHELL, Guo. H. MORGAN. 

